Centrifugal machine



Aug. 3 192a.

J. F. MEYER ET AL CENTRIFUGAL MACHINE Filed June 2, 1925 operation thereof and preventing disturb- PatentedAug. 3, 1926.

UNITED STATES JOHANN. FBIEDRICH MEY,ER, 0F IBERLI N, Hans L-fIcKER, or scrapie, AND cam.

scrrm'rz, or OELDE, GERMANY.

cnNrnIrUeAL MACHINE.

Application filed June 2,

This-invention refers broadly to a closed centrifugal drum for the clarification of liquids and for similar purposes, and it is intended to devise means for facilitating the ance by clogging and otherwise. In the practical operation of centrifugal machines, particularly of those provided with insertion bodies comprising a plurality of spacedly superimposed plates or dishes, these are clogged, particularly in their lower portions, by the solid particles separated from the liquid to be clarified to such an extent as to necessitate the interruption of the operation and the most detailed cleaning of the insertion bodies. In view thereof, it has already been suggested to carry .out the clarifying process in two stages, a prelimi nary clearing and a finishing or fine-clearing, these two stages being performed in two centrifugal drums, a preliminary clearing drum with coarse insertion and a fine-clearing drum with more delicately shaped and subdivided insertion bodies and by this means it was intended to separate out in the drum first-mentioned the coarser particles of the liquid by centrifugal action, while in the second drum the finer particles had to be separated. The employment of two drums, however, constitutes a serious complication of the entire arrangement and of the operation of the plant. Particularly in the case of the admission and discharge of the substances to be treated under pressure the duplication of the cleaning process ens tailsa great many inconveniences, inasmuch as it is obvious that, among other drawbacks, the tightening of the drums stuffing boxes will have to be duplicate In view thereof, this invention has forits object to perform the preliminary clearing and the finishing or fine-clearing in a very simple manner in a single centrifugal drum. This object issubstantially accomplished by. the fact that the lower portion of the insertion body which, in' the case of drums provided for the entire vertical extension with insertion dishes or plates, is bein 'clo in a' very short time is so shape a rranged as to'serve as a preliminary clearing chamber with ordinary slm'ple-in- 1925. Serial N5. 34,464.

sertion pieces, while the finely subdivided.

insertion pieces are only disposed in the upper portion of the drum.- The insertion body in the closed preliminary clearing chamber may comprise a simple cylindrical body adapted. to conduct the material under centrifugal treatment by direct action into a zone of higher, more intense centrifugal force, thereby effecting the separation of the coarse constituents on the walls of the preliminary-clearing chamber. On the other hand, the insertion body of the fine clearing: chamber may consist in the usual manner of a plurality of spacedly superimposed plates or dishes. It has been ascertained in the practical operation of the invention that by this arrangement 7 a very efficient preliminary and fine-clearing combined may be obtained in a single centrifugal drum without requiring an increase 0 the circumference of the drum for the same output. 1

The invention will be-more specifically described with reference to the accompanying drawing showing by way of example a form of embodiment of the principles of the invention in a vertical section through a centrifugal drum.

As appears from the drawing, the centrifugal drum illustrated by way of exempli- "fication comprises the. drum casing 1 and the cover 2 of the drum with a screwthreaded ring 3 connecting the two parts with the intermediary of a tightening or packing member 4. The operation of the drum is effected by means of a vertical shaft 5 which is suitably journalled and bay/connected to a driving source, motor 'or the like. Within the drum 1, 2 a cylindrical insertion body 6 is disposed the outer wall of which merge-s into a conical part 7 which is connected to the admission pipe 8. The hollow insertion body 6 constitutes the preliminary clearing chamber and contains the displacement body or member 9' concentrically arranged with relation to the shaft 5 and of cylindrical upwardly conical shape. Upon the conical wall 7. of the preliminary clearin chamber a plurality of plates or dis es 10 likewise substantmlly conical" are disposed which are kept n spaced relation to each other by suitable projections. The admission pipe 8 is surrounded, by a tubular extension 11 of the which merges into the admission pipe 16 and may be supported on a stationary point in any suitable manner. The entire centrifugal drum may be spacedly surrounded in the usual manner by a stationary casing which at the same time may be employed to retain the casing 15 of the stufling boxes in its proper position, thus, for instance, by means of vertical stays? or supports.

The substance to be submitted to centrifugal action and admitted through the opening 16 flows in the direction of the arrows into thepreliminary clearing chamber 6 in which by means of the insertion body 9 the first separation of solid constituents is effected which collect on the wall of the preliminary clearing chamber 6. The liquid is then forcibly conducted through the openings 17 and the ports 18 at the bottom of the preliminary clearing chamber 6 into the casing 1 of the drum, where by the increased centrifugal force of'the outer wall of the preliminary clearing chamber a further separation of solid particles is eifected which are deposited at the wall of the drum casing.

The liquid will then be delivered onto the subdivided insertion piece 7 where the final clearing is efiected, and thence it is conducted through the pipe 11 and to the eduction pipe 12. As appears therefrom, the liquid upon its entire path is submitted to a clarifying operation in several stages by whichmeans the coarse and the finer admixtures are separated out, without any 1ia-. bility of clogging or choking up of the in,- sertion pieces of the drum.

The device according to this invention may, of course, be used for the clarification of dilferent liquids, such for instance, of beer, oil, or of similar substances to be adapted for centrifugal operation. Particu-- larly in the case of the clarification of beer and of similar liquids it/has been found to be highly eflic'ient, inasmuch as the otherw1se very soon occurring clogging up of the insertion bodies by the separated yeast is entirely avoided. k i

The invention in its several details may, of course, be carried out and arranged in various ways difierent from the embodiment shown by way' of 'exemplification in the drawing.- Thus, the fine-clearing chamber,

instead of being provided with plates, dishes or the like, may also be furnished with 'filtellng substances or mstrumentaliti'e or with other cleaning, clearing or purifying insertions and other changes and modifications may be made in the construction and arrangement of the parts and details of our invention, without deviating from the spirit thereof, except as stated in the claims hereinafter appended.

We claim 1. In a cylindrical centrifugal clarifier drum provided with a conical cover and subdivided into an interior annular preliminary clarifying chamber and an outer annular final clarifying chamber by means of an apertured partition coaxial to the walls of the drum and the cover, the arrangement of a substantially nu-indented abutment member in said interior chamber and of subdivided abutting members in said external chamber parallelly super-imposed upon the conical part of said partition.

2. A cylindrical centrifugal clarifier" drum.

subdivided in three clarifying chambers working in series, the first chamber being constituted b anapertured partition coaxial to the we l of the drum and enclosing an unindented central abutment member for preliminary clarification, the second chamber comprising the space between this partition and the cylindrical wall of the drum and serving. for further clarification, the third chamber containing a plurality of spaced and parallelly superimposed dishshaped abutting members for final clarifi- ,cation.

' 3. A centrifugal clarifier consisting of a cylindrical drum and a conical cover and subdivided in three clarifying chambers working in series and communicating one to the other, the first chamber being limited by a cylindrical and partly conical apertured partition spacedly and coaxially disposed in the interior of the drum and enclefsing a substantially cylindrical and partconical abutment membertcentrally arranged in the drum, the second chamber being constituted by the space between the cylindrical walls of thedrum and the partition and communicating at its bottom with the first chamber, the third chamber comprising the space between the conical walls of the plurality of spacedly and parallelly superimposed conical dish-shaped abutting members.

4. In a cylindrical centrifugal. clarifier in combination a cylindrical drum, a conical cover connected to said drum, a cylindrical cover and the partition andv containing a and partly conical apertured dividing partition in the interior of drum and cover, a substantially cylindrical and partly conical member centrally disposed in the drum, a plurality of subdivided conical dish-shaped abutting members placed upon the conical partition wall, a central admission DiPe connected to the conical partition wall; an educting pipe spacedly 'surroanding th e admis' sion pipe and connectedto the conical cover, admission pipe and the intermediate chamstufiing boxes for these two pipes, a housing ber of this housing respectively.

common for both the stufiing boxes and con- In testimony whereof we aflix our signa- 10 taining between these boxes an intermediate tures.

chamber communicating with the educting J OHANN FRIEDRICH MEYER, pipe, and inlet and outlet means provided HANS LfiCKER.

on this housing and communicating with the CARL SQHMITZ. 

